Valve-gear.



ERNEST T. GILLIARD, OF HANOVER, IENNSYLVANIA.

'VALVE-GEAR.

valves, which are normally closedv by springs and opened by suitable devices actuated from a Cain; and the present invention resides in novel means whereby both valves may be s1- inultaneously operated from one push rod,

and comprises peculiarly disposed and related co-acting levers whereby the valves may be unseated at the saine time and to the same extent'. y

l. will explain the invention with refer-"r ence to the accompanying drawing which illustrates a practical embodiment thereof, and will enable others to manufacture and use the same, and the claims set forth in brief the essential -iteatuies of the invention for which protection is desired.

n the embodiment of the invmtion herein shown the valves are closed by springs and each is opened by the movement of a related pivoted lever, and one of such levers operates the other "and is in turn itself operated by the push rod.

lWith this invention the two valves can be simultaneously operated and each valve have the exact desired extent of movement.

Referring to the drawing, 1 designates part of the cylinder of an engine, having a head 1 provided with ports l", 1 adapted to be closed by similar valves 2b, 2. The valve 2l 'is normally closed by means of a spring 2 interposed between a collar 2, on the stem 2 o said valve, and the head 1. Similarly valve 2 is normally closed by means of a spring 2 interposed between a collar 2, on stem 2 of said valve, and the head 1"'. y

The valve 2b is ladapted to befunseated by means of a rocking lever 3 pivoted at 3b on a stud im on head 1. One arm of lever 3 is provided with a bearing point 3a which Specification of Letters Patent.

Patented Nov., is, isis.

Application led January G, 1917. Serial No. 140,994.

engages the upper end of the stein 2. The other arm of lever 3 is provided with a bearing point which is-adapted to be engaged by the'upper end of a push rod 5, that may be actuated by a cam, not shown, such as is usually employed on this type or engine, said push rod engaging lever 3 at the proper times and in such manner as to cause opening of the valve 2b, or permit its closing.

A lever 4 is pivoted at 4b on a stud ln attached to head 1; and extends inwardly past stein 2 of valve 2, and this lever 4 is provided with an intermediate bearing point 4 which engages the upper end of the .stem 2.

Theiinner arm of lever 3 extends beyond the polnt 3El and has a bearing point 3 which is adapted to engage with an opposed bear- .ing point 4 on the inner end of lever 4; the

inner end of lever 3 overlapping the inner end of lever 4 as shown.

The bearing `point 3 is preferably formed by the rounded end of a bolt 3 tapped through the lever 3, and which bolt can be locked in adjusted position by means of a nut 3.

The bearing points 3, 4EL and 3, 4 are so positioned relatively to the pivots 3, 4b of the levers 3 and 4, that if the lever 3 be rocked to Open valve 2b, valve 2 will be also simultaneously opened. |The extent of opening of the valves is determined by the extent of lifting movement of the rod 5. The extent of opening of the valves, in rela tion tov the movement of the rod 5, being proportionate to the distances of the bearing points 3, 4a from the pivots 3b, 4.

Preferably the bearing points 3, 4 are so located that in the normal position the point of Contact between 3 and 4 is exactly midway between the valve stems 2, 2; and

and synchronous operation of the' two valves to rbe realized. The bearing points 324 being shown as located exactl midway between the centers 3b, 4b, an stems 2, 2, it follows that the valves will be uniformly and synchronously operated.

between the What claim is:

1. In Valve mechanism, e pair of similarly opening valves each having e projecting stem, springs on the Steins for movin the valves in one direction, an oscillating ever pivoted adjacent one of the stems and lieving an inner arm engaging said stem and extending past Said stem toward the other stein and an outwardly projecting arm eX tending beyond its pivot, means engaging the vseid outwardly projecting aim to oscillate the leve-i' and cause it vto move the valve againstl the spring; e second lever pivoted adjacent the other stein and extending pest said seem anni contacting lie-rewitlo,frl ie inner ends of seid levers overlapping and contacting, substantially as described.

2. In valve mechanism, a pair of similaily .opening valves each having a projecting stem, springs on the stems for moving the Les Valves in one direc-iem en oseilieiing leve? pivotefl adjacent one of the stems and hawing inner erin engaging said. stein and eX tending pesi, seid stem oweel the other stem, and an opposite sini entenfiing ont- 

